| 0040 | Fill N2 cold trap full. |
| 1120 | Fill LN2 coldtrap full. |
| 1340 | Stop flashing detectors. |
| 1905 | Filled LN2 coldtrap full. |
| 1040 | Start data acquisition. Each bias set will consist of six 10-minute data series, interspersed by 6 seconds of flashing and 20 minutes of cooldown. 3.2768 ms trace length; 400 us delay; 200 uS coincidence time; 2K events per file. Data acquired for following biases in order: +4 V DCRC33 (DIB1), -4 V DCRC31(DIB2); -4 V DCRC33, +4 V DCRC31, +3 V DCRC33, -3 V DCRC31; -3 V DCRC33, +3 V DCRC31. DIB3 kept at 0V. Phonon OR trigger thresholds set at 25 ADC for all phonon channels on each DIB. |
| 1145 | Fill LN2 cold trap full. |
| 2245 | Commence data acquisition. Trigger rate very poor at 0.7 Hz. Additionally, pulses on DCRC50 appeared slightly later than those on from the other DCRCs, implying that there may be a problem with the timing link. Important to note that the pulses themselves were not delayed relative to those from DIBs 1 & 2; they simply appeared on the screen about a second later than they should have. Trigger positions were also rather erratic. Reset timing link, and noticed that trigger threshold of 25 ADC bins on phonon channel D3 (DCRC50, DIB 3) was causing a lot of triggers. Interestingly, the same threshold on channels A3, B3 & C3 resulted in no triggers. This may be due to the negative phonon pulses from this DIB, as setting a negative threshold appeared to solve the problem. However, reading back the trigger threshold from the board via the telnet session yielded very high trigger threshold values. Due to the confusion, decided it would be best to keep trigger thresholds positive and increase D3's threshold to 50 ADC bins to reduce the trigger rate. Seems to have done the trick. However, the QET biases for DIB 3's TESs should be changed to invert the polarity of the pulses as very few triggers originate from this DIB in the current state. |
| | Commence data acquisition. Each bias set shall consist of six 10 minute data series, interspersed by 6 seconds of flashing and 20 minutes of cooldown. Trace length 3.2768 ms, 400 μs trigger delay; 2k events per file. Data acquired for following biases in order: +/-4 V; -/+4 V; +/-3 V; & -/+3 V. Detector exposed to Ba-133 source. Phonon OR trigger thresholds set at 25 ADC bins for all phonon channels except D3, which was set at 50 ADC bins. First data series: 07140402_2243. |
| 2335 | Take opportunity of break in data acquisition to fill N2 cold trap full. |